Boiler-flue fastener.



WILLIAM E. PARKINSON, OF CROWN POlNT, INDIANA.

BOLLER-FLUE FASTESR.

To all 'whom it may concern: l

Be it known that' i, W1LLLiM E. Pasion SON, a citizen of the United States, residing at Crown Point, in the county ofLake and State of indiana, have invented a new and useful Boiler-Fine Fastener, of which the fol lowing is a specification. l

This invention relates to boiler ihies, and has for its principal objectto provide a novel form of fastening means for holding the fines to the flue sheets.

With this and other objects in View, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings, and .particularly pointed out in the appended claims, it heinfy understood that various changes in the form, proportions, size and ininor details of construction may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings z--Figure i- 1s a longitudinal sectional elevation of a boiler flue and its fasteners constructed in ac-l cordance with the invention. Fig. 2 is a similar View of the fastener illustrating particularly the construction adopted When used in connection with old flues. Figs. 3, 4 and 5 are details of the securing device more specifically described hereinafter.

Similar numerals of reference are einployed to indicate corresponding Aparts throughout the several figures of the draw 1n s. y

n devices of this class heretofore constructed, the end of the flue has been threaded to receive inner and outer clamping nuts bearing against the opposite faces of the fiue sheet, but so far as l ain aware no attempt has been made to provide an outer jam nut that tapers down in the'fornrof a thin wedge,

Y which, when inserted in the tapered wall `of the iue sheet opening will irinl Aloind between the flue and the Wall off the opening and permit to some extent a swaging action in order that the metal may conform to irregularities in the wall of the o ening, and thus form a perfectly steam tiglit joint, 'the resistance to the leakage of steam being in creased u1 proportion sure within the boiler.

In carrying out the present invention, therefore, provision is made for accomplishto the increase in pres- Speciication of Letters Eatent.

Patented June 23, i908.

Application flied February 23, 1907. Serial No. 358,931.

t ie outer sides or faces of the sheets, said o e'nings being slightly greater in diameter tran the 'external diameter of the fine 12. The 'lines are of the usual construction, that is to say, of uniform. diameter, from end to end, and the' end portions are provided with peripheral threads that extend some distance alon the length of the flue, as shown in Fig. 1. n each end of the ue is screwed a jam nut i3, that referahly is provided with notches le for t e reception of a suitable tool, and said nuts serve as bracing members to revcnt inward movement of the sheets. he inner ends of the openings in. the fine sheets are taered or counter-sunk, and the ends of the am nuts are tapered in order 'that they may closely nt Within the tapered portions of the openings and form a perfectly steam tight joint.

The outer ends of the flue project some distance beyond the outer faces of the sheet, and each end of the ue receives a tapered nut 15 which,may, also, be provided with notches lo forA the reception of a tool.4 flhe inner end of the nut is tapered to a thin edge which enters the space between the periphery of the flue and the inner wall of the opening, and bears against the tapered portion of the wall of said. opening, so that as the nut is turned, a swagin action will take place, and the tapered portion oi' the nut will conform to any irregularitiesin the wall of the openn ing, thus forming a joint that will he pen fectly steam tight.

@Wing tothe engagement of the tapered face of the nut with the tapered wall of the opening, any bulging of the sheets which may occur through excessive pressure Within the boiler will tighten the joint, the elfectiveness of the joint increasing in roportion to the pressure exerted from Wit 'n' the boiler, so that leakage of steam is positively prevented and it 1oecomcs unnecessary to employ any packing or similar material, or to swage the end of the flue itself, so that if a flue is burned' out or otherwise injured, it may he readily removed by unscrewln' the nuts to permit the insertion of a new ue.

@ne of the particular advantages of the present invention is the ease and rapidity with which new llues may be placed in position as for emergency repairs at sea or at other points Where lues and the other iacilities for the repairs oi boilers are lacking. An old iiue i'nay be removed and the end portions which were previously upset cut away, This reduces the length of the Aflue to a considerable extent, and it would not' ordinarily be available for use in the saine boiler.

The shortened flue is threaded at both ends, and one end is secured in place in the manner previously described, While the opposite end is entered in an internally' threaded thinihle i7 having a tapered shoulder 18 that bears against the inner face of the flue sheet, that portion of 'the thi-mble which bears against the ilue sheet being tapered, and the wall of the'opening being corre'- spondingly tapered in order to insure a steam tight lit. The smaller end of the thirnble which projects through the opening, in the Hue sheet is threaded for the reception of a tapered nut of the character previously described, and the opening in the Hue sheet is reanied out on taperedlines in readiness to receive said nut. These thi mbles are usually placed in the rear flue sheet and may be retained in position While the front ends are removed when it becomes necessary to rese inea place the flue, so that the thimbles wilhbe inV readiness to receive a new lue.

lilith a device constructed in accordance. 35 1with the present invention, repairs .may be readilyniade and when new ilues are `employed in the manufacture of new boilers,A A i they are so placed that-anyone, or n iore may be readily renewedwithout difficulty.

I claim l rihe combination with the flue sheets. of a boiler, of a tubehaving one end secured for jects, and a nut screwed onto the projectingend of the 'thiinble and having a tapered shoulder bearing against theexterior edges of the flue opening.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses,

WILLIAM E. PARKINSON.

Witnesses:

GusrAv ZACHAU, FRANCES GiiIMMER. 

